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202 lines
6.5 KiB
Fortran
202 lines
6.5 KiB
Fortran
!
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!
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! MLD2P4 version 2.1
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! MultiLevel Domain Decomposition Parallel Preconditioners Package
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! based on PSBLAS (Parallel Sparse BLAS version 3.4)
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!
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! (C) Copyright 2008, 2010, 2012, 2015, 2017
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!
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! Salvatore Filippone Cranfield University
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! Ambra Abdullahi Hassan University of Rome Tor Vergata
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! Alfredo Buttari CNRS-IRIT, Toulouse
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! Pasqua D'Ambra ICAR-CNR, Naples
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! Daniela di Serafino University of Campania "L. Vanvitelli", Caserta
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!
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! Redistribution and use in source and binary forms, with or without
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! modification, are permitted provided that the following conditions
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! are met:
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! 1. Redistributions of source code must retain the above copyright
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! notice, this list of conditions and the following disclaimer.
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! 2. Redistributions in binary form must reproduce the above copyright
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! notice, this list of conditions, and the following disclaimer in the
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! documentation and/or other materials provided with the distribution.
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! 3. The name of the MLD2P4 group or the names of its contributors may
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! not be used to endorse or promote products derived from this
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! software without specific written permission.
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!
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! THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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! ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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! TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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! PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE MLD2P4 GROUP OR ITS CONTRIBUTORS
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! BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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! CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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! SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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! INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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! CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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! ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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! POSSIBILITY OF SUCH DAMAGE.
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!
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!
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! File: mld_sprecbld.f90
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!
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! Subroutine: mld_sprecbld
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! Version: real
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! Contains: subroutine init_baseprec_av
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!
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! This routine builds the preconditioner according to the requirements made by
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! the user through the subroutines mld_precinit and mld_precset.
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!
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!
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! Arguments:
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! a - type(psb_sspmat_type).
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! The sparse matrix structure containing the local part of the
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! matrix to be preconditioned.
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! desc_a - type(psb_desc_type), input.
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! The communication descriptor of a.
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! p - type(mld_sprec_type), input/output.
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! The preconditioner data structure containing the local part
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! of the preconditioner to be built.
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! info - integer, output.
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! Error code.
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!
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subroutine mld_sprecbld(a,desc_a,prec,info,amold,vmold,imold)
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use psb_base_mod
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use mld_s_prec_mod, mld_protect_name => mld_sprecbld
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Implicit None
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! Arguments
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type(psb_sspmat_type),intent(in), target :: a
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type(psb_desc_type), intent(inout), target :: desc_a
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class(mld_sprec_type),intent(inout), target :: prec
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integer(psb_ipk_), intent(out) :: info
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class(psb_s_base_sparse_mat), intent(in), optional :: amold
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class(psb_s_base_vect_type), intent(in), optional :: vmold
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class(psb_i_base_vect_type), intent(in), optional :: imold
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! Local Variables
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type(mld_sprec_type) :: t_prec
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integer(psb_ipk_) :: ictxt, me,np
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integer(psb_ipk_) :: err,i,k,err_act, iszv, newsz
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integer(psb_ipk_) :: ipv(mld_ifpsz_), val
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integer(psb_ipk_) :: int_err(5)
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type(mld_dml_parms) :: prm
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integer(psb_ipk_) :: debug_level, debug_unit
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character(len=20) :: name, ch_err
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if (psb_get_errstatus().ne.0) return
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info=psb_success_
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err=0
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call psb_erractionsave(err_act)
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debug_unit = psb_get_debug_unit()
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debug_level = psb_get_debug_level()
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name = 'mld_sprecbld'
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info = psb_success_
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int_err(1) = 0
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ictxt = desc_a%get_context()
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call psb_info(ictxt, me, np)
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prec%ictxt = ictxt
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),&
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& 'Entering '
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!
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if (.not.allocated(prec%precv)) then
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!! Error: should have called mld_sprecinit
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info=3111
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call psb_errpush(info,name)
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goto 9999
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end if
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!
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! Check to ensure all procs have the same
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!
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newsz = -1
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iszv = size(prec%precv)
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call psb_bcast(ictxt,iszv)
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if (iszv /= size(prec%precv)) then
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info=psb_err_internal_error_
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call psb_errpush(info,name,a_err='Inconsistent size of precv')
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goto 9999
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end if
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if (iszv <= 0) then
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! Is this really possible? probably not.
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info=psb_err_from_subroutine_
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ch_err='size bpv'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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!
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! Number of levels = 1
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!
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if (iszv == 1) then
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!
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! Check on the iprcparm contents: they should be the same
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! on all processes.
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!
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call psb_bcast(ictxt,prec%precv(1)%parms)
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prec%precv(1)%base_a => a
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prec%precv(1)%base_desc => desc_a
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if (info /= psb_success_) then
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call psb_errpush(psb_err_internal_error_,name,a_err='Base level precbuild.')
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goto 9999
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end if
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call prec%precv(1)%check(info)
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if (info /= psb_success_) then
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write(0,*) ' Smoother check error',info
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call psb_errpush(psb_err_internal_error_,name,&
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& a_err='One level preconditioner check.')
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goto 9999
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endif
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call prec%precv(1)%sm%build(a,desc_a,info,&
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& amold=amold,vmold=vmold,imold=imold)
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if (info /= psb_success_) then
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call psb_errpush(psb_err_internal_error_,name,&
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& a_err='One level preconditioner build.')
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goto 9999
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endif
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!
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! Number of levels > 1
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!
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else if (iszv > 1) then
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!
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! Build the multilevel preconditioner
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!
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call prec%hierarchy_build(a,desc_a,info)
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if (info /= psb_success_) then
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info=psb_err_internal_error_
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call psb_errpush(info,name,a_err='Error from hierarchy build')
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goto 9999
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end if
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call prec%smoothers_build(a,desc_a,info,amold,vmold,imold)
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if (info /= psb_success_) then
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info=psb_err_internal_error_
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call psb_errpush(info,name,a_err='Error from smoothers build')
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goto 9999
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end if
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end if
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(err_act)
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return
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end subroutine mld_sprecbld
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